One vertex per element, one color per generator, with an edge from x to x·s.
(6,9)(7,11)(14,17)(18,20)(21,22)(23,29)(24,32)(25,26)(27,31)(28,33)(30,35)(34,36) involution — undirected(2,4)(6,9)(10,12)(15,19)(18,20)(22,26)(24,33)(27,29)(30,34) involution — undirected(1,2,3,4)(5,6)(7,10)(8,9)(11,12)(13,14)(15,18)(16,17)(19,20)(21,22)(23,29)(24,28)(25,26)(27,31)(30,36)(32,33)(34,35)(5,6)(7,10)(8,9)(11,12)(13,15,16,19)(14,18,17,20)(21,23,25,31)(22,27,26,29)(24,34,33,30)(28,36,32,35)(5,7)(6,10)(8,11)(9,12)(13,14)(15,18)(16,17)(19,20)(21,24)(22,28)(23,30)(25,33)(26,32)(27,35)(29,36)(31,34) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.